Due to the increasing incidence of cancer, the use of anti-tumor compounds is very important. Cancer prevention is a set of measures to prevent or develop cancer, and by using these methods, the number of new cancers in a group or population, as well as deaths from cancer, is reduced. Scientists assess risk factors and protect themselves to prevent new cancer cases. Any factor that reduces the risk of cancer is a protective factor that some drugs are in this category. Pharmaceutical supplements like vitamins D and C and other antioxidants as well as drugs that inhibit tumorigenic or inhibitory tumor growth they have metformin, atrostatin, aspirin, tamoxifen.